linux tabstrip: Animate a pinned tab on title change until it is stopped because of a user action.
linux tabstrip: Animate a pinned tab on title change until it is stopped because of a user action.

This matches the behaviour on windows/chromeos.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/7631037

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@97331 0039d316-1c4b-4281-b951-d872f2087c98

yitian134/chromium,yitian134/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,ropik/chromium,ropik/chromium,adobe/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,ropik/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,gavinp/chromium,ropik/chromium,yitian134/chromium,yitian134/chromium,gavinp/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,yitian134/chromium